remove duplicate ssl/record/tls_pad.c

Signed-off-by: Ncode4lala <fengziteng2@huawei.com>
Change-Id: I8be4f5c60df0ad52e0fc4abbb938f510a0cfffa8

BUILD.gn

@@ -1431,7 +1431,7 @@ ohos_source_set("ssl_source") {
     "ssl/record/ssl3_buffer.c",
     "ssl/record/ssl3_record.c",
     "ssl/record/ssl3_record_tls13.c",
-    "ssl/record/tls_pad.c",
+    # ssl/record/tls_pad.c has been added into libcommon_common_sources
     "ssl/statem/extensions.c",
     "ssl/statem/extensions_clnt.c",
     "ssl/statem/extensions_cust.c",